,AAA,AA,A,BBB,BB,B,D
AAA,0.999492,0.000000,0.000000,0.000000,0.000000,0.000000,0.000508
AA,0.000000,0.977095,0.022176,0.000000,0.000000,0.000000,0.000729
A,0.000000,0.048004,0.940797,0.009642,0.000000,0.000000,0.001557
BBB,0.000000,0.000000,0.000000,0.989720,0.000000,0.000000,0.010280
BB,0.000000,0.000000,0.000000,0.000000,0.982240,0.000000,0.017760
B,0.000000,0.000000,0.000000,0.000000,0.000000,0.900026,0.099974
D,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,1.000000